platform_CrosDisksFormat: Fix typo.

BUG=None
TEST=None

Change-Id: Ib33344e572cec218a180e3f4901041b6dc5e0922
Reviewed-on: https://chromium-review.googlesource.com/565478
Commit-Ready: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
diff --git a/client/site_tests/platform_CrosDisksFormat/platform_CrosDisksFormat.py b/client/site_tests/platform_CrosDisksFormat/platform_CrosDisksFormat.py
index e8b69ea..c5ac345 100644
--- a/client/site_tests/platform_CrosDisksFormat/platform_CrosDisksFormat.py
+++ b/client/site_tests/platform_CrosDisksFormat/platform_CrosDisksFormat.py
@@ -23,7 +23,7 @@
         logging.info('Testing "%s"', config['description'])
         filesystem_type = config['filesystem_type']
         format_options = config.get('format_options')
-        # Create a zero-filled virtual filesystem image to help stimulate
+        # Create a zero-filled virtual filesystem image to help simulate
         # a removable drive.
         with VirtualFilesystemImage(
                 block_size=1024,